... ABSTRACT: In Japan, some mountain tunnels are damaged by earthquakes and relative large-scale deformations such as the collapse of permanent lining and the deformation of supports have occurred. Although the earthquake resistant countermeasures for tunnels has been examined recently, some...

... ABSTRACT: Tunnels constructed in the rock formation have been considered safe against earthquakes. However, the 1995 Hyogo-ken Nanbu Earthquake (M7.3) caused large damages to mountain tunnels as many as to other structures. Tunnels are one of the important infrastructures, so the evaluation...

... to be squeezed and cracked, which eventually led to the collapse of the tunnel. During excavation stage of mountain tunnels, the rock mass surrounding the tunnel will deform due to stress relaxation. It is necessary to implement appropriate support methods according to factors such as geological conditions...

... conditions ahead of a tunnel face under construction of a mountain tunnel (Aoki et al., 2010) in view of the established method (Schubert et al., 1995). Though the prediction method of Schubert et al. requires the displacement in the direction of tunnel axis, it is difficult to obtain its accurate data...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 The mechanism behind seismic damage to railway mountain tunnels and assessment of their aseismic performance Y. Kojima, K. Yashiro & T. Funahashi Tunnel Engineering...

... ABSTRACT Concrete lining is at times adopted as part of the support members for mountain tunnels. In the case of concrete lining for road tunnels in particular, concrete lining with a 30 cm width is applied at a standard rate of 10.5mper two days, due to the characteristics of construction...

... ABSTRACT Generally the mountain tunnels are little damaged by earthquake. However, recent case studies of the damage of mountain tunnels caused by earthquakes also show that they are likely to be damaged when the energy scale of earthquake is large, the tunnel is near the earthquake...

... ABSTRACT The time-dependent features of soft rock, named rheology generally, should be taken into account in the longterm design and maintenance of mountain tunnels. Based on the classic Burger-MC rheological model, a Burger-Deterioration rheological model is proposed in this paper...